High-voltage switch



Mm 6, W6? J. c. CLASON HIGHVOLTAGE SWITCH I Filed April 7, 1965 INVENTOR "(75177 C, CZason mfi/iwmvwwm ATTORNEY 3,324,444 HIGH-VOLTAGE SWITCH Jan Christiaan Clason, Hengelo, Overijssel, Netherlands, assignor to N.V. Fabriek van Electrische Apparaten voorheen F. Hazenmeijer & Co., Hengelo, Overijssel, Netherlands, a corporation Filed Apr. 7, 1965, Ser. No. 446,252 Claims priority, application Netherlands, Apr. 14, 1964, 6,404,029 1 Claim. (Cl. 339-19) The invention relates to a high-voltage switch with a conducting bridge piece provided with two holes, in each of which holes a sleeve contact is pinched, said bridge piece being fixed in a cap of insulating material by means of at least one annular member.

Such a high-voltage switch is described in applicants earlier Dutch patent application 285,096.

In the apparatus described therein the cap of insulating material is moulded and is provided with a metal holding member that is embedded in the insulating material and has flanged rims, the bridge piece being secured in the holding member behind its flanged rims by means of annular members. This known construction, however, cannot be used when the cap is made by injection moulding. In this case it is not possible to embed the metal holdin-g member in the insulating material.

The invention provides a high-voltage switch of the type mentioned above, which is characterized in that the cap has two, preferably tubular, bearing stubs, which extend in the sleeve contacts pinched in the respective holes in the bridge piece, each of the stubs being provided with a cross saw cut, that can cooperate with a ring that lies fiat against the bridge piece and is provided with cams, the arrangement being such, that the cams by rotating of the ring can be brought into the respective saw cuts through recesses in the sleeve contact walls.

Of course it is not necessary for the apparatus according to the invention to have an injection moulded cap, and a moulded cap can be used just as well. In the latter case the further advantage is obtained, that the metal holding member can be dispensed with, whereby the material expenditures of the high voltage switch decrease.

The invention will now be explained in more detail by referring to the enclosed drawing, in which:

3 ,324,444 Patented June 6, 1967 FIG. 1 illustrates the apparatus according to the invention in a longitudinal sectional view.

FIG. 2 is a section of the apparatus of FIG. 1 along the line II.

In the drawing it is shown that in the conducting bridge piece 5 two sleeve contacts 6 are pinched by means of the bolt 7. In the sleeve contacts 6 extend the associated tubular bearing stubs with partition 2, which form part of the insulating cap 1 existing of eg polycarbonate. The ring 4 that lies flat against the bridge piece can also be of polycarbonate, and by rotating it in anti-clockwise direction about the annular part 5a of the bridge piece, its cams 4a can be brought into engagement with the saw cuts 3 in the tubular bearing stubs 2 and at the same time with the recesses in the sleeve contacts which are also formed as saw cuts. In the position shown in the drawing the ring 4 is locked by the cam 4b, which is snapped behind the pin 5b, so that the bridge piece with the sleeve contacts cannot loosen by vibration.

The ring 4 has also two cams 4c and the gaps between these cams and the cams 4a permit insertion of a forked tool that serves for mounting the bridge piece 5 into the cap.

What I claim is:

A high voltage switch comprising a cap of insulating material having a pair of tubular bearing stubs, and a conducting bridge piece provided with two holes, in each of which a tubular contact is placed, means to secure said contacts in said holes, said bearing stubs extending into said contacts and each contact and bearing stub being provided with aligned horizontal slots, a ring lying fiat against the bridge and rotatively attached to said bridge, said ring having a pair of cams mounted thereon, so that rotation of said ring engages said cams with the slots and locks said bridge and said contacts in the cap.

References Cited UNITED STATES PATENTS 7/1880 Clarrick 339-246 8/1904 Fritchle 339-49 

